We got our hands on Tamron's second-generation SP 15-30mm F2.8 a couple of months ago at Photokina, and we've just started shooting with a copy for Nikon mount. The lens sports a number of internal enhancements, such as the addition of a second processor so that autofocus and stabilization are each handled by their own chip. See how we've gotten along with the lens so far.

See our Tamron SP 15-30mm F2.8 G2 sample gallery